package com.lmh.ymw.service.order;

import com.lmh.ymw.utils.ShoppingCart;

/**
 * Created by bdqn on 2016/5/11.
 */
public interface CartService {

    public ShoppingCart modifyShoppingCart(String productId, String quantityStr, ShoppingCart cart) throws Exception;

    public ShoppingCart calculate(ShoppingCart cart) throws Exception;


}
